package com.huixixi.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.huixixi.common.R;
import com.huixixi.dto.DishDto;
import com.huixixi.entity.Category;
import com.huixixi.entity.Dish;
import com.huixixi.entity.DishFlavor;
import com.huixixi.service.CategoryService;
import com.huixixi.service.DishFlavorService;
import com.huixixi.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * 菜品管理
 */
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        dishService.saveWithFlavor(dishDto);

        //清理更新的分类下面的菜品Redis缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_" + dishDto.getStatus();
        redisTemplate.delete(key);

        return R.success("菜品添加成功");
    }


    /**
     * 分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);

        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);
            //获取分类id
            Long categoryId = item.getCategoryId();
            //根据id获取分类对象
            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }


    /**
     * 根据id查询菜品的信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    /**
     * 提交修改菜品信息
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        dishService.updateWithFlavor(dishDto);

        //清理更新的分类下面的菜品Redis缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_" + dishDto.getStatus();
        redisTemplate.delete(key);

        return R.success("菜品信息修改成功");
    }


    /**
     * 删除菜品和批量删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> deleteById(@RequestParam List<Long> ids) {
        //删除菜品信息
        dishService.removeWithDish(ids);
        //清理菜品Redis缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);

        return R.success("菜品删除成功");
    }


    /**
     * 修改菜品的售卖状态
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable Integer status, @RequestParam List<Long> ids) {

        for (Long id : ids) {
            Dish dish = dishService.getById(id);
            dish.setStatus(status);
            dishService.updateById(dish);
        }
        //清理菜品Redis缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);
        return R.success("菜品状态修改成功");
    }


  /*  *//**
     * 根据条件查询对应的菜品数据
     * @param dish
     * @return
     *//*
    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper();

        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId ,dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByDesc(Dish::getSort).orderByAsc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){

        List<DishDto> dishDtoList = null;
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //从Redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        //数据如果存在直接返回数据，不去查询数据库
        if (dishDtoList != null){
            return R.success(dishDtoList);
        }

        //数据如果不存在则查询数据库中的信息

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        redisTemplate.opsForValue().set(key, dishDtoList,60, TimeUnit.MINUTES);
        return R.success(dishDtoList);
    }
}
